Usage patterns can easily change for a variety of reasons. WhatsApp is hugely popular now, but tomorrow it might be something else not based in the US. If they

Usage patterns can easily change for a variety of reasons. WhatsApp is hugely popular now, but tomorrow it might be something else not based in the US. If they manage to write a law such that it bans strong encryption from the App Store, that will achieve their goal. But any other scenario is at best a temporary gain.